Clamping device for tappets, wheels, or shaft-couplings.



Ho. 820,037. PATENTBDMAY "3 E996 (LA. GANDA. CLAMPING DEVICE FOR TAPPBTS, WHEELS, 0R SHAFT COUPLINGS.

Egg mm 1 1,71,; :rstklr I PATENTED MAY 8, 1906. O. A. CANDA.

GLAMPING DEVICE FOR TAPPBTS, WHEELS, ORSHAFT COUPLINGS.

APPLIUATIOR YILEID 0612B, 90}

2 SHEETS-SHEET 2V UINL'I'EI) STATES PATENT OFFICE.

CHARLES A. CANDA, or ROSELLE, NEW JERSEY.

Specification of Letters Patent.

Application me October 2e 1905. Serial No. 234,:341.

To all whom it may concern.-

Be it known that I, CHARLES A. OANDA, a

citizen oi the United States, residin in R0.

sells, in the count of Union and btete of 5 New Jersey, have invented certain new and useful Improvements in Clamping Devices for Ta pets, Wheels, Shaft-Couplings, &c., of whic the following is e'specification.

My invention relates to cla nping devices for stamp-mill teppets end for cemswheeis, shafts, and the like, and comprises a novel errnn ement of wedges and 'associetedpazts where y s tappet, cam, or wheel may be secured. to or released from a. shaft or stem or whereby two shafts may be coupled or uncoupled very uickly endreedil'y and with out the use ofioose perts or the provision of keyways, recesses, projections, ,or the like on the shaft or stem.

The objects of my invention are to improve and siniplifg clamping devices adapted or the uses speci or releasing to be effected very quickly and with the application of very little power, to avoid the use of parts which must be detached when releasing the clamping device and so are likely to be lost, to insure substantial centering of the teppet, cam, or wheel, or the like with respect to the shaft or stem on which 7 it is mounted, "to make the device strong,

simple, inexpensive to manufacture, and easy to use, and tomake the number of its parts as small as possible. 7

,I will now roceed to describe my mventions, and will then point out the nove featuresinclaims. 7

In the'said drawings Figures i 2, and 3 are views illustrating the application of my improved clamping device to a. stampnfill tappet, Fig. 1 showing a. vertical section of the tcppet and clamping device ingpl ece on Myimproved clampin d evice comprises an inclosing' member whic 1 in the case of a,

ed, to permit the clamping tion with re erence to accompnnying drawings, illustrating one form of device embcdymg my invention 1nvarious ep hoes stamp-mill tap et is the tappet itself in the case of a cam, w ieel, or pulleyis the huh thereof end in the c'eseflof e sheft-conpiing is the seeing of the coupling, seiel inclesingrnemher having a. bore eccentric to the stern, shaft, or the like on which the clamping device is to act, a plurality of segmental wee ges mounted surround thesaid shaft or stem; and a. longitudinal taper key fittin between two such wedges and adapted to orce the same apart.

Referring now to the draw'in and at first to Figs. 1 to 3, inclusive, showing my invention applied to a teppet, mime ral 1 designates the stem to which the tsppet is to be ap lied, and 2 designates the said tappet orine osing member provided with a bore eccentric with Patented m e, 1906.

within such eccentric bore and aclapted to u respect to the stem 1' and containing Within such eccentric bore a plurality of wedges 3, 4;

end 5, the latter two bein substantial coinlements of eechother. hese wedgesagre 1n the form of segmentel blocks;the outer curvature of which corresponds to. the. bore of member lend the inner curvature of which corresponds to that of the stem 1. In order to insure substantial centering of the ,teppet with respect to the stem, the wedge 3 is prefersbly held stationery withrcs ect to Incinher 2 by a pinfi. Between we gas 4 and 5 is a taper wedge 2 which, as shown, is a round taper pinflt ting within grooves of correspond-' 7 coves wit n which it slight variation of size of the stem, &c. In

the (lIiLW1I1 s the taper of the pin is exaggen. sited in OH or to make it cleerlyevident to .the eye. The pin'7 is provitle'gl' withsnitable means for drawing it u ill the instance shown a screw-nut 8; the wed es against the sides of the member- 2; to 11cc the cost of machining, and to prevent the wedgesirenrfalling out before they ere set up, said wedges are preferably provided with projecting ring or shoulders 9, fitting within suit able grooves in the u-ien her 2. In practice only the peripheries of these ring or shoulders are fitted to the grooves of member 2, the portions of the wedges intermediate said shoulders having slight clearance with respect to the hereof the member :2, so as not to rer uire fitting and not to mterpose fractional resistance.

o redueeiriction of In applymg' the ta pet to the stem l said .tappet, with thew in place therein, is placed on the stem 1 and adjusted to the roper position thereon, the wedges 4 and 5 ingset so that they are about equidistant from" wedge 3, and then the taper pin or wedge] 18 drawn up, forcing the wedges 4 and 5a art, and therefore because of the sccentric ore of member 2 forcing them tightly mag'ainst thestem, thereby holdlngthe tap at fimly to the stem. It will'be noted that these'wedges engage substantiall the entire peri hery of the stem, so that t ere is relati've y large surface for frictional contact; and

e stem'is' held very firmly without the 's 'ghtest marring of its surface. -To release the tappet, it is necessary rrerely to unscrew slightly the nut onvpin7 without removing it from said pin altogether and then drive down the pin so as to free it from the wedges 4 and 5.

. It being easy to set wedges 4 and 5 about equidistant from wedge 3, the ta pet when clamped in place is of necessity su stantially concentric with stem 1. :5. The construction of the clamping device my be substantially the same whether emplo'yed a'tappet, shaft-coupling, or hub of a pulley, ca'm, or the like. In Fig. I5 the clamp is shown in a shaft-ecu lin each of" the two, shafts lbeing held y t e sin is clam ing device and bein thereb coup ed toget er. In this figure have own the nut 8 and the end 0 the in 7 recessed between the wedges to avoi projecting parts. In Fig. 6 the clamping device is shown in the hub of a belt-wheel and arranged to clamp the said wheel to a shaft. The construction of the device is the same as in the receding figures, except that I have shown]; e wedge or in 7 as a taper screw. 7

deem it unnecessary td illustrate further applications and forms of my/cla ping de vlce, as many such will occur to those skllled in the art.

What I claim is- 4 T 1. In a clamping device such as described, the combination with an inclosing member, of a plurality ofwedges at least three in number within the same having inner and outer curved surfaces which are relative] eccentric, the intermediate wedge secure to said inclosing member and'the others movable with res ect thereto, and means independent of said Intermediate wedge for forcing said 55 latter wedges apart.

mom

2. In a clamping device such as described, I the combination with an inclosing member,

with resp'ect thereto, and a longitudinal wedge between'said latter wedges for forcing tlie'same'a' art.

3. n a c amping'device such as described, the combinationgwith an inclosing; member having a grooved bore, of a pluralit of wed es within"said bore having shou ders withln and fitted to said ooves, the pertions of the surfaces of sai wedges intermediate said shoulders being out of contact with said inclosing member, and having inner and outer surfaces which are relatively eccentric, and means for forcin said wedges a art.

4. "In a clamping evice such as d escribed, the combination with an inclosin member having an eccentric bore, of a p urality of wedges at least three' in number having outer surfaces fitting said bore and inner surfaces adapted to fit the object to be held, the intcrmediate wedge secured to said inclosing member, and means independent of said in termediate wedge for operating said wedges.

5. In a clamping devlce such as described, the combination with an inclosin member having an eccentric bore, of a p urality of Wedges at least three in number having outer surfaces fitting said bore and inner surfaces adapted to fitthe object to be held, the intermediate wed e secured to said inclosing member, and a ongitudinal wedge between said other wedges.

to fit the object to be held, and means for operating said wedges.

In testimony whereof I affix my slgnature in the presence of two witnesses.

CHARLES A. GANDA. Witnesses:

ABNER CANDA, JonN CASALEGGI- member" 

